21728356

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{383}}^1\times {\mathrm{1091}}^1$

素因数の和:1491

約数の個数: 24

約数和(自身を含む): 41094144

約数和(自身を除く): 19365788

約数列:

[1, 2, 4, 13, 26, 52, 383, 766, 1091, 1532, 2182, 4364, 4979, 9958, 14183, 19916, 28366, 56732, 417853, 835706, 1671412, 5432089, 10864178, 21728356]

約数ペア:

[(1, 21728356), (2, 10864178), (4, 5432089), (13, 1671412), (26, 835706), (52, 417853), (383, 56732), (766, 28366), (1091, 19916), (1532, 14183), (2182, 9958), (4364, 4979)]